Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,871 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.201.204.0/22 | 1k | APNIC |  CN | 21st Nov 2015 |
| 103.201.208.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.212.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.216.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.220.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.224.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.228.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.232.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.236.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.240.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.244.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.248.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.252.0/22 | 1k | APNIC | CN | 21st Nov 2015 |
| 103.201.28.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.32.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.36.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.4.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.40.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.44.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.48.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.52.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.56.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.60.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.64.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.72.0/22 | 1k | APNIC |  HK | 19th Nov 2015 |
| 103.201.76.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.8.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.80.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.84.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.88.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.92.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.201.96.0/22 | 1k | APNIC | CN | 19th Nov 2015 |
| 103.202.116.0/22 | 1k | APNIC | CN | 23rd Nov 2015 |
| 103.202.156.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.160.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.164.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.168.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.172.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.176.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.180.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.184.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.188.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.192.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.196.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.200.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.204.0/22 | 1k | APNIC | CN | 24th Nov 2015 |
| 103.202.212.0/22 | 1k | APNIC | CN | 26th Nov 2015 |
| 103.202.219.0/24 | 256 | APNIC |  US | 26th Nov 2015 |
| 103.202.226.0/24 | 256 | APNIC |  ID | 23rd Feb 2023 |
| 103.202.228.0/22 | 1k | APNIC | CN | 26th Nov 2015 |